Enhanced Signaling to Enable Wi-Fi Peer-To-Peer Transmissions Within a Fully Scheduled Basic Service Set

This disclosure generally relates to systems and methods for wireless communications and, more particularly, to Wi-Fi peer-to-peer communications.

Wireless devices are becoming widely prevalent and are increasingly requesting access to wireless channels. The Institute of Electrical and Electronics Engineers (IEEE) is developing one or more standards that utilize Orthogonal Frequency-Division Multiple Access (OFDMA) in channel allocation.

The following description and the drawings sufficiently illustrate specific embodiments to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, algorithm, and other changes. Portions and features of some embodiments may be included in, or substituted for, those of other embodiments. Embodiments set forth in the claims encompass all available equivalents of those claims.

The 802.11 technical standards define wireless communications for Wi-Fi, including peer-to-peer (P2P) connections managed within a basic service set (BSS). In 802.11, target wake time (TWT) is a concept used to reduce device power consumption by allowing devices to determine when to be awake (e.g., as opposed to in a low-power mode) to send and receive data. For example, a STA may remain awake during a service period (SP), and may be in a doze state (e.g., low-power/sleep mode) outside of the SP. A SP refers to a time when a device is to listen to the communication medium. A restricted TWT allows an access point (AP) to allocate exclusive access to a communication medium at specific times. A restricted TWT allows station devices (STAs) and APs to obtain channel access with a high probability during a scheduled SP, and the channel access may be used for P2P or normal uplink/downlink transmissions.

Transmit opportunity (TXOP) is an 802.11 feature that defines the time during which a STA may send frames after it has gained access to the communication medium. TXOP sharing (TXS) refers to when a TXOP is shared by multiple STAs for simultaneous transmissions. Triggered TXS refers to when an AP may send a modified multi-user (MU) request-to-send (RTS) frame to solicit uplink or P2P physical layer (PHY) protocol data unit (PPDU) transmissions from STAs. Both restricted TWT and TXS allow an AP to achieve a determined quality of service (QOS) within a BSS hosted by the AP by balancing the QoS needs for P2P sessions with ongoing uplink and downlink sessions.

During an SP, STAs may attempt to send or receive data, whether during TXS or because an unscheduled STA may attempt to gain channel access during a SP. Therefore, STAs may still need to used contention-based techniques to access the Wi-Fi channel even during a scheduled SP.

It is expected that in future versions of the 802.11 TXS procedure, the MU enhanced distributed channel access (EDCA-the contention-based channel access method) procedure will be extended to the P2P PPDU transmissions as well, meaning that a STA that has been allocated resources for P2P transmissions via a trigger frame may be prohibited from transmitting P2P PPDUs using EDCA for some time. However, in some cases, the prohibition may be undesirable. For example, if a STA is part of a restricted TWT SP and it has an urgent packet to transmit, then the STA may be allowed to transmit using EDCA during this time. This concept also applies for UL PPDU transmissions during a r-TWT (restricted TWT) SP. Effectively, a STA EDCA may be de-prioritized during a restricted SP, preventing urgent STA transmissions. The de-prioritization may refer to a technique defined by the 802.11ax standard in which the STA may use EDCA during a SP, but using a longer timer than usual to de-emphasize EDCA.

Some techniques provide a fully scheduled mode in which an AP uses an ordered sequence of frame transmissions to schedule a set of STAs within a SP. In each SP, the following operations may be performed in sequence prior to data exchange: polling, resource allocation, and optionally sounding. For example, the 802.11be standard defines, for shared TXOPs, a procedure in which an AP sends a MU-request to send trigger frame, and when a STA responds with a CTS frame, the AP refrains from transmitting PPDUs within an allocated time specified by the MU-request to send trigger frame. However, the existing techniques have not provided for facilitating P2P transmissions under this approach, as the AP does not signal the P2P time period and relevant information for STAs to use for P2P communications in fully scheduled BSS SPs of the current 802.11 standards.

There is therefore a need for enhanced P2P transmission techniques within a fully scheduled BSS mode.

In one or more embodiments, a SP (which may be a restricted SP) may include a polling phase, a resource allocation phase, an optional sounding phase, and a data phase. During the polling phase, an AP may poll STAs to collect resource allocation requests from STAs, and may allocate resources accordingly during the resource allocation phase. The data phase may include multiple TXOPs, which may include P2P portions (e.g., times during TXOPs when STAs may send P2P communications). The P2P portions may be signaled according to the embodiments presented herein.

In one or more embodiments, to address the de-prioritization during a restricted SP, an AP may control more dynamically when MU EDCA may be used by an STA (e.g., following a trigger-based channel access opportunity). To address the lack of P2P transmissions for a fully scheduled BSS mode, the signaling used for resource allocation and polling in the fully scheduled mode may be extended to allow P2P transmissions. During a polling phase of a fully scheduled BSS, the STA may signal the presence or absence of P2P traffic by sending non-zero energy on allocated tones to indicate P2P or UL traffic. During an allocation phase of the fully scheduled BSS, the AP may signal whether a TXOP is to be used at least partially for P2P transmissions. The AP may poll the responding STAs to solicit airtime requests. Rather than a trigger frame causing a STA to change parameters (e.g., to de-emphasize EDCA), the trigger frame may control when STAs may transmit during a shared SP. A trigger frame may poll STAs to solicit P2P and UL traffic. A STA may respond by sending non-zero energy on allocated tones (e.g., specific tones, but not on others) to indicate P2P or UL traffic. The AP may poll the responding STAs to solicit airtime requests.

In one or more embodiments, a STA may use EDCA during a SP with a timer set at the end of the SP (e.g., as opposed to after a last transmission during the SP). The AP may signal whether EDCA timer rules apply in a given SP.

In one or more embodiments, a frame used for signaling the allocation of resources (e.g., an OPS frame-opportunistic power save frame) may be extended to signal whether the allocation is for uplink/downlink or P2P transmissions. OPS refers to splitting a beacon interval (e.g., the time period between consecutive beacons) into multiple sub-intervals referred to as TWT SPs. An AP may specify which STA is to use a TWT SP (e.g., by sending a traffic indication map-TIM). A STA not included in a TIM may doze during the TWT SP. The STA may attempt to gain access to the communication medium during the TWT SP, and may doze even when other traffic, including beacons, are sent during the TWT SP. In this manner, an OPS frame may be used to indicate which STAs are to be awake (e.g., not in a doze/low-power state) during a SP, and which STAs may be in a doze/low-power state during a SP.

In one or more embodiments, the frame used for signaling allocation of resources for P2P traffic may be a modified MU-RTS TXS frame containing multiple users, with each user corresponding to a location in the time-domain. Multiple STAs may be allocated the same time window on the same or different resource units (RUs). The allocations for P2P need not be contiguous.

In one or more embodiments, the allocation frame may further signal if the STA should wait for a separate MU-RTS TXS frame to transmit P2P PPDUs, or if the STA can use point (coordination function) interframe space (PIFS) or EDCA to transmit its PPDUs within the allocated time.

In one or more embodiments, the AP may signal/negotiate during a TWT or r-TWT (re)-setup (e.g., TWT information element-IE) whether MU EDCA timer rules are suspended within the SP.

In one or more embodiments, the AP may signal explicitly in a frame transmitted during the SP whether MU EDCA rules are deferred for the rest of the SP for a particular STA. For example, the signaling can be in a trigger frame (TF) transmitted to the STA. One reserved bit may be used to signal the same. This signaling can be in a new 802.11 management frame, and/or may be in extension of a control frame (e.g., OPS frame). Further signaling of the duration of the deferral may also be provided (e.g., by reusing the OPS Duration field in the OPS element or by defining a new field). 802.11 defines management, control, and data frames. Management frames are used to manage a BSS. Control frames are used to control access to a medium. Data frames include payloads with upper-layer (e.g., of the communication stack) information. Management frames include beacons, probe requests/responses, association requests/responses, and authentication requests/responses, among others. Control frames include OPS, request-to-send, clear-to-send, acknowledgements (ACKs), NDP announcements (NDPAs), and others.

In one or more embodiments, the parameters (including the arbitration interframe space number-AIFSN- and codeword parameters) used for EDCA access within the SP may be different (e.g., less aggressive) than baseline parameters. This can be signaled semi-statically or defined in the 802.11 specification or signaled dynamically during the SP.

In one or more embodiments, a STA can re-draw its backoff parameters within the SP according to new EDCA parameters and do the same outside the SP. In case of collisions, the re-drawn backoff counters while transitioning in and out of a SP may account for the number of collisions so far in obtaining TXOP. Current MU EDCA parameters have updated the codeword minimum/maximum parameters, which means that current codeword and current backoff do not change immediately, but may change later. To apply this concept within SPs, the STA can re-draw a new backoff with a codeword with the new parameters (e.g., after a reset) at beginning of a TWT SP.

In one or more embodiments, a null data packet (NDP) feedback report (NFRP) trigger frame used to poll STAs during the SP can include signaling to solicit information about presence or absence of P2P traffic.

The above descriptions are for purposes of illustration and are not meant to be limiting. Numerous other examples, configurations, processes, algorithms, etc., may exist, some of which are described in greater detail below. Example embodiments will now be described with reference to the accompanying figures.

1 FIG. 100 100 120 102 120 is a network diagram illustrating an example network environment, in accordance with one or more example embodiments of the present disclosure. Wireless networkmay include one or more user devicesand one or more access points(s) (AP), which may communicate in accordance with IEEE 802.11 communication standards. The user device(s)may be mobile devices that are non-stationary (e.g., not having fixed locations) or may be stationary devices.

120 102 4 FIG. 5 FIG. In some embodiments, the user devicesand the APmay include one or more computer systems similar to that of the functional diagram ofand/or the example machine/system of.

120 102 110 120 102 120 102 120 124 126 128 102 120 102 One or more illustrative user device(s)and/or AP(s)may be operable by one or more user(s). It should be noted that any addressable unit may be a station (STA). An STA may take on multiple distinct characteristics, each of which shape its function. For example, a single addressable unit might simultaneously be a portable STA, a quality-of-service (QOS) STA, a dependent STA, and a hidden STA. The one or more illustrative user device(s)and the AP(s)may be STAs. The one or more illustrative user device(s)and/or AP(s)may operate as a personal basic service set (PBSS) control point/access point (PCP/AP). The user device(s)(e.g.,,, or) and/or AP(s)may include any suitable processor-driven device including, but not limited to, a mobile device or a non-mobile, e.g., a static device. For example, user device(s)and/or AP(s)may include, a user equipment (UE), a station (STA), an access point (AP), a software enabled AP (SoftAP), a personal computer (PC), a wearable wireless device (e.g., bracelet, watch, glasses, ring, etc.), a desktop computer, a mobile computer, a laptop computer, an ultrabook™M computer, a notebook computer, a tablet computer, a server computer, a handheld computer, a handheld device, an internet of things (IoT) device, a sensor device, a PDA device, a handheld PDA device, an on-board device, an off-board device, a hybrid device (e.g., combining cellular phone functionalities with PDA device functionalities), a consumer device, a vehicular device, a non-vehicular device, a mobile or portable device, a non-mobile or non-portable device, a mobile phone, a cellular telephone, a PCS device, a PDA device which incorporates a wireless communication device, a mobile or portable GPS device, a DVB device, a relatively small computing device, a non-desktop computer, a “carry small live large” (CSLL) device, an ultra mobile device (UMD), an ultra mobile PC (UMPC), a mobile internet device (MID), an “origami” device or computing device, a device that supports dynamically composable computing (DCC), a context-aware device, a video device, an audio device, an A/V device, a set-top-box (STB), a blu-ray disc (BD) player, a BD recorder, a digital video disc (DVD) player, a high definition (HD) DVD player, a DVD recorder, a HD DVD recorder, a personal video recorder (PVR), a broadcast HD receiver, a video source, an audio source, a video sink, an audio sink, a stereo tuner, a broadcast radio receiver, a flat panel display, a personal media player (PMP), a digital video camera (DVC), a digital audio player, a speaker, an audio receiver, an audio amplifier, a gaming device, a data source, a data sink, a digital still camera (DSC), a media player, a smartphone, a television, a music player, or the like. Other devices, including smart devices such as lamps, climate control, car components, household components, appliances, etc. may also be included in this list.

As used herein, the term “Internet of Things (IOT) device” is used to refer to any object (e.g., an appliance, a sensor, etc.) that has an addressable interface (e.g., an Internet protocol (IP) address, a Bluetooth identifier (ID), a near-field communication (NFC) ID, etc.) and can transmit information to one or more other devices over a wired or wireless connection. An IoT device may have a passive communication interface, such as a quick response (QR) code, a radio-frequency identification (RFID) tag, an NFC tag, or the like, or an active communication interface, such as a modem, a transceiver, a transmitter-receiver, or the like. An IoT device can have a particular set of attributes (e.g., a device state or status, such as whether the IoT device is on or off, open or closed, idle or active, available for task execution or busy, and so on, a cooling or heating function, an environmental monitoring or recording function, a light-emitting function, a sound-emitting function, etc.) that can be embedded in and/or controlled/monitored by a central processing unit (CPU), microprocessor, ASIC, or the like, and configured for connection to an IoT network such as a local ad-hoc network or the Internet. For example, IoT devices may include, but are not limited to, refrigerators, toasters, ovens, microwaves, freezers, dishwashers, dishes, hand tools, clothes washers, clothes dryers, furnaces, air conditioners, thermostats, televisions, light fixtures, vacuum cleaners, sprinklers, electricity meters, gas meters, etc., so long as the devices are equipped with an addressable communications interface for communicating with the IoT network. IoT devices may also include cell phones, desktop computers, laptop computers, tablet computers, personal digital assistants (PDAs), etc. Accordingly, the IoT network may be comprised of a combination of “legacy” Internet-accessible devices (e.g., laptop or desktop computers, cell phones, etc.) in addition to devices that do not typically have Internet-connectivity (e.g., dishwashers, etc.).

120 102 The user device(s)and/or AP(s)may also include mesh stations in, for example, a mesh network, in accordance with one or more IEEE 802.11 standards and/or 3GPP standards.

120 124 126 128 102 130 135 120 102 130 135 130 135 130 135 Any of the user device(s)(e.g., user devices,,), and AP(s)may be configured to communicate with each other via one or more communications networksand/orwirelessly or wired. The user device(s)may also communicate peer-to-peer or directly with each other with or without the AP(s). Any of the communications networksand/ormay include, but not limited to, any one of a combination of different types of suitable communications networks such as, for example, broadcasting networks, cable networks, public networks (e.g., the Internet), private networks, wireless networks, cellular networks, or any other suitable private and/or public networks. Further, any of the communications networksand/ormay have any suitable communication range associated therewith and may include, for example, global networks (e.g., the Internet), metropolitan area networks (MANs), wide area networks (WANs), local area networks (LANs), or personal area networks (PANs). In addition, any of the communications networksand/ormay include any type of medium over which network traffic may be carried including, but not limited to, coaxial cable, twisted-pair wire, optical fiber, a hybrid fiber coaxial (HFC) medium, microwave terrestrial transceivers, radio frequency communication mediums, white space communication mediums, ultra-high frequency communication mediums, satellite communication mediums, or any combination thereof.

120 124 126 128 102 120 124 126 128 102 120 102 Any of the user device(s)(e.g., user devices,,) and AP(s)may include one or more communications antennas. The one or more communications antennas may be any suitable type of antennas corresponding to the communications protocols used by the user device(s)(e.g., user devices,and), and AP(s). Some non-limiting examples of suitable communications antennas include Wi-Fi antennas, Institute of Electrical and Electronics Engineers (IEEE) 802.11 family of standards compatible antennas, directional antennas, non-directional antennas, dipole antennas, folded dipole antennas, patch antennas, multiple-input multiple-output (MIMO) antennas, omnidirectional antennas, quasi-omnidirectional antennas, or the like. The one or more communications antennas may be communicatively coupled to a radio component to transmit and/or receive signals, such as communications signals to and/or from the user devicesand/or AP(s).

120 124 126 128 102 120 124 126 128 102 120 124 126 128 102 120 124 126 128 102 Any of the user device(s)(e.g., user devices,,), and AP(s)may be configured to perform directional transmission and/or directional reception in conjunction with wirelessly communicating in a wireless network. Any of the user device(s)(e.g., user devices,,), and AP(s)may be configured to perform such directional transmission and/or reception using a set of multiple antenna arrays (e.g., DMG antenna arrays or the like). Each of the multiple antenna arrays may be used for transmission and/or reception in a particular respective direction or range of directions. Any of the user device(s)(e.g., user devices,,), and AP(s)may be configured to perform any given directional transmission towards one or more defined transmit sectors. Any of the user device(s)(e.g., user devices,,), and AP(s)may be configured to perform any given directional reception from one or more defined receive sectors.

120 102 MIMO beamforming in a wireless network may be accomplished using RF beamforming and/or digital beamforming. In some embodiments, in performing a given MIMO transmission, user devicesand/or AP(s)may be configured to use all or a subset of its one or more communications antennas to perform MIMO beamforming.

120 124 126 128 102 120 102 Any of the user devices(e.g., user devices,,), and AP(s)may include any suitable radio and/or transceiver for transmitting and/or receiving radio frequency (RF) signals in the bandwidth and/or channels corresponding to the communications protocols utilized by any of the user device(s)and AP(s)to communicate with each other. The radio components may include hardware and/or software to modulate and/or demodulate communications signals according to pre-established transmission protocols. The radio components may further have hardware and/or software instructions to communicate via one or more Wi-Fi and/or Wi-Fi direct protocols, as standardized by the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards. In certain example embodiments, the radio component, in cooperation with the communications antennas, may be configured to communicate via 2.4 GHz channels (e.g. 802.11b, 802.11g. 802.11n, 802.11ax), 5 GHz channels (e.g. 802.11n, 802.11ac, 802.11ax), or 60 GHz channels (e.g. 802.11ad, 802.11ay). 800 MHz channels (e.g. 802.11ah). The communications antennas may operate at 28 GHz and 40 GHz. It should be understood that this list of communication channels in accordance with certain 802.11 standards is only a partial list and that other 802.11 standards may be used (e.g., Next Generation Wi-Fi, or other standards). In some embodiments, non-Wi-Fi protocols may be used for communications between devices, such as Bluetooth, dedicated short-range communication (DSRC), Ultra-High Frequency (UHF) (e.g. IEEE 802.11af, IEEE 802.22), white band frequency (e.g., white spaces), or other packetized radio communications. The radio component may include any known receiver and baseband suitable for communicating via the communications protocols. The radio component may further include a low noise amplifier (LNA), additional signal amplifiers, an analog-to-digital (A/D) converter, one or more buffers, and digital baseband.

1 FIG. 1 FIG. 2 FIG. 102 120 140 140 140 210 120 150 In one or more embodiments, and with reference to, the APand the user devicesmay exchange frames. The framesmay include 802.11 management, control, and/or data frames. For example, the framesmay be sent during or before an SP (e.g., the SPof) to signal EDCA rules and parameters, and/or whether certain portions of the SP may be used for Wi-Fi P2P communications. The user devicesmay exchange Wi-Fi P2P frameswith one another, for example, during or after a SP, as described further with respect to.

2 FIG. 200 illustrates an example processfor enabling Wi-Fi peer-to-peer communications within a fully scheduled basic service set, in accordance with one or more example embodiments of the present disclosure.

2 FIG. 202 204 206 208 204 210 202 210 212 214 216 218 212 204 220 202 210 212 204 222 202 210 212 204 202 224 206 226 208 202 210 212 204 228 202 212 204 230 206 232 208 214 204 234 234 234 234 234 210 234 218 214 216 204 236 210 Referring to, a BSSof an APmay include user devices (e.g., STA, STA, etc.). The APmay establish an SPfor the BSS, the SPincluding a polling portion, a resource allocation portion, and optional sounding portion, and a data transmission portion. During the polling portion, the APmay broadcast a TIM, indicating which devices of the BSSmay receive traffic during the SP. During the polling portion, the APmay send a NFRP trigger frame (TF)to trigger (e.g., request) the devices of the BSSto respond with requests for transmissions during the SP. During the polling portion, the APmay identify NDP responses received from the devices of the BSS(e.g., NDPsent by the STA, NDPsent by the STA). The NDP responses may indicate which of the STAs of the BSSmay be requesting TXOPs during the SP. During the polling portion, the APoptionally may transmit a BSRP TFto poll for the uplink buffer status of the devices of the BSS. During the polling portion, the APoptionally may identify BSRP responses received from the STAs that have uplink buffer traffic (e.g., BSRPreceived from the STA, BSRPreceived from the STA). During the resource allocation portion, the APmay broadcast an OPS frameto indicate to STAs not included in the OPS framethat they may enter a power save mode until after an OPS duration (e.g., defined by the OPS frame) concludes (e.g., the OPS frameindicating that STAs included in the OPS frameare to remain awake during the OPS duration of the SP). The OPS framemay schedule TXOPs during the data transmission portion. After the resource allocation portionand optional sounding portion, the APmay transmit a management frame(e.g., to indicate EDCA rules and parameters, and/or to indicate whether any TXOPs during the SPmay be used for Wi-Fi P2P communications).

2 FIG. 218 238 240 204 242 242 238 206 244 206 238 238 206 208 204 240 248 Still referring to, the data transmission portionmay include TXOPs (e.g., TXOP, TXOP, etc.), which may be shared (e.g., TXS) or unshared. 802.11be defines a TXS procedure in which the APoptionally may transmit a MU-RTS TXS TFto solicit a CTS frame from STAs. The MU-RTS TXS TFmay allocate time within a TXS (e.g., the TXOP) to a single STA. The STAmay respond with a CTS, indicating that the STArequests a portion of the TXOPto be used for Wi-Fi P2P communications. As a result, a portion of the TXOPmay be used by the STAand the STAfor Wi-Fi P2P communications. The APmay use any of the preceding frames to allocate a portion of the TXOPfor Wi-Fi P2P communications.

210 204 206 208 202 210 238 240 In one or more embodiments, to address the de-prioritization during a restricted SP (e.g., the SP), the APmay control more dynamically when MU EDCA may be used by an STA (e.g., following a trigger-based channel access opportunity). For example, the STAand/or the STAmay use MU EDCA to gain access to a Wi-Fi communication channel used by the BSSduring the SP(e.g., during the TXOPand/or the TXOP).

214 212 212 202 206 208 224 226 214 204 204 222 242 222 224 226 204 228 In one or more embodiments, to address the lack of P2P transmissions for a fully scheduled BSS mode, the signaling used for the resource allocation portionand the polling portionin the fully scheduled mode may be extended to allow P2P transmissions. During the polling portionof a fully scheduled BSS (e.g., the BSS), the STAand/or the STAmay signal the presence or absence of P2P traffic by sending non-zero energy on allocated tones to indicate P2P or UL traffic (e.g., using the NDPand/or the NDP). During the resource allocation portionof the fully scheduled BSS, the APmay signal whether a TXOP is to be used at least partially for P2P transmissions. The APmay poll the responding STAs to solicit airtime requests. Rather than a trigger frame causing a STA to change parameters (e.g., to de-emphasize EDCA), a trigger frame (e.g., the NFRP TF, the MU-RTS TXS TF) may control when STAs may transmit during a shared SP. The NFRP TFmay poll STAs to solicit P2P and UL traffic. A STA may respond by sending non-zero energy on allocated tones (e.g., specific tones, but not on others) to indicate P2P or UL traffic (e.g., using the NDPand/or the NDP). The APmay poll the responding STAs to solicit airtime requests (e.g., using the BSRP TF).

206 208 210 250 210 204 In one or more embodiments, the STAand/or the STAmay use EDCA during the SPwith a timer (e.g., backoff timer) set at the end of the SP(e.g., as opposed to after a last transmission during the SP). The APmay signal whether EDCA timer rules apply in a given SP.

234 204 220 220 206 208 234 210 210 In one or more embodiments, a frame used for signaling the allocation of resources (e.g., the OPS frame) may be extended to signal whether the allocation is for uplink/downlink or P2P transmissions. The APmay specify which STA is to use a TWT SP (e.g., by sending the TIM). A STA not included in the TIMmay doze during the TWT SP. The STAand/or the STAmay attempt to gain access to the communication medium during the TWT SP, and may doze even when other traffic, including beacons, are sent during the TWT SP. In this manner, the OPS framemay be used to indicate which STAs are to be awake (e.g., not in a doze/low-power state) during the SP, and which STAs may be in a doze/low-power state during the SP.

242 In one or more embodiments, the frame used for signaling allocation of resources for P2P traffic may be the MU-RTS TXS TFcontaining multiple users, with each user corresponding to a location in the time-domain. Multiple STAs may be allocated the same time window on the same or different RUs. The allocations for P2P need not be contiguous.

In one or more embodiments, the allocation frame may further signal if a STA should wait for a separate MU-RTS TXS frame to transmit P2P PPDUs, or if the STA can use PIFS or EDCA to transmit its PPDUs within the allocated time.

204 210 140 210 1 FIG. In one or more embodiments, the APmay signal/negotiate during a TWT or r-TWT (re)-setup (e.g., TWT information element-IE) whether MU EDCA timer rules are suspended within the SP. The TWT IE may be included in a beacon or another frame (e.g., the framesof), which may be sent during or before the SP.

204 210 210 222 242 234 In one or more embodiments, the APmay signal explicitly in a frame transmitted during the SPwhether MU EDCA rules are deferred for the rest of the SPfor a particular STA. For example, the signaling can be in a trigger frame (e.g., the NFRP TF, the MU-RTS TXS TF) transmitted to the STA. One reserved bit may be used to signal the same. This signaling can be in a new 802.11 management frame, and/or may be in extension of a control frame (e.g., the OPS frame). Further signaling of the duration of the deferral may also be provided (e.g., by reusing the OPS Duration field in the OPS element or by defining a new field).

210 210 In one or more embodiments, the parameters (including the arbitration interframe space number-AIFSN- and codeword parameters) used for EDCA access within the SPmay be different (e.g., less aggressive) than baseline parameters. This can be signaled semi-statically or defined in the 802.11 specification or signaled dynamically during the SP.

250 210 210 In one or more embodiments, a STA can re-draw its backoff timerparameters within the SPaccording to new EDCA parameters and do the same outside the SP. In case of collisions, the re-drawn backoff counters while transitioning in and out of a SP may account for the number of collisions so far in obtaining TXOP. Current MU EDCA parameters have updated the codeword minimum/maximum parameters, which means that current codeword and current backoff do not change immediately, but may change later. To apply this concept within SPs, the STA can re-draw a new backoff with a codeword with the new parameters (e.g., after a reset) at beginning of a TWT SP.

222 210 In one or more embodiments, the NFRP TFused to poll STAs during the SPcan include signaling to solicit information about presence or absence of P2P traffic.

3 FIG. 300 illustrates a flow diagram of illustrative processfor enabling Wi-Fi peer-to-peer communications within a fully scheduled basic service set, in accordance with one or more example embodiments of the present disclosure.

302 102 204 519 210 206 208 202 212 214 216 218 238 240 1 FIG. 2 FIG. 5 FIG. 2 FIG. 2 FIG. 2 FIG. 2 FIG. 2 FIG. At block, a device (e.g., the APof, the APof, the enhanced P2P deviceof) may identify a SP (e.g., the SPof) for STAs in a BSS (e.g., the STAand the STAin the BSSof). The SP may include a polling portion (e.g., the polling portion, a resource allocation portion (e.g., the resource allocation portionof), an optional sounding portion (e.g., the sounding portion), and a data transmission portion (e.g., the data transmission portionof) having one or more TXOPs (e.g., the TXOPand/or the TXOPof).

304 220 2 FIG. At block, the device may transmit a TIM (e.g., the TIMof) during the polling portion. The TIM may indicate traffic from the device, and may be used by the receiving STAs of the BSS to determine whether or not to be available to receive a given frame from the device.

306 222 2 FIG. At block, the device may transmit, during the polling portion, a NFRP trigger frame (e.g., the NFRP TFof) to solicit the STAs of the BSS to request transmissions (e.g., TXOPs) based on the TIM.

308 At block, the device may identify, during the polling portion, NDP responses received from one or more responding STAs of the BSS. The NDP responses may indicate that the respective sender may request sending/receiving traffic during the SP in response to the NFRP trigger frame.

310 234 2 FIG. At block, the device may transmit (e.g., broadcast), during the resource allocation portion, an OPS frame (e.g., the OPS frameof) indicating which STAs are to enter power save for an OPS duration of the SP and which STAs are to remain awake during the OPS duration.

312 2 FIG. At block, the device may transmit an indication associated with at least one of the station devices applying MU-EDCA following a trigger-based channel access opportunity during the SP, or with using a TXOP of the TXOPs for Wi-Fi P2P communications. The indication may be transmitted using one of the frames ofto facilitate Wi-Fi P2P communications, specifically by signaling whether MU-EDCA rules apply during the SP, which MU-EDCA parameters to apply and to which STAs, whether a portion of a TXOP during the SP may be used for P2P communications, the resource allocation information for performing P2P communications, and the like, as described above.

It is understood that the above descriptions are for purposes of illustration and are not meant to be limiting.

4 FIG. 4 FIG. 1 FIG. 1 FIG. 600 102 120 400 shows a functional diagram of an exemplary communication station, in accordance with one or more example embodiments of the present disclosure. In one embodiment,illustrates a functional block diagram of a communication station that may be suitable for use as an AP() or a user device() in accordance with some embodiments. The communication stationmay also be suitable for use as a handheld device, a mobile device, a cellular telephone, a smartphone, a tablet, a netbook, a wireless terminal, a laptop computer, a wearable computer device, a femtocell, a high data rate (HDR) subscriber station, an access point, an access terminal, or other personal communication system (PCS) device.

400 402 410 401 402 400 406 408 402 406 The communication stationmay include communications circuitryand a transceiverfor transmitting and receiving signals to and from other communication stations using one or more antennas. The communications circuitrymay include circuitry that can operate the physical layer (PHY) communications and/or medium access control (MAC) communications for controlling access to the wireless medium, and/or any other communications layers for transmitting and receiving signals. The communication stationmay also include processing circuitryand memoryarranged to perform the operations described herein. In some embodiments, the communications circuitryand the processing circuitrymay be configured to perform operations detailed in the above figures, diagrams, and flows.

402 402 402 406 400 401 402 408 406 408 408 In accordance with some embodiments, the communications circuitrymay be arranged to contend for a wireless medium and configure frames or packets for communicating over the wireless medium. The communications circuitrymay be arranged to transmit and receive signals. The communications circuitrymay also include circuitry for modulation/demodulation, upconversion/downconversion, filtering, amplification, etc. In some embodiments, the processing circuitryof the communication stationmay include one or more processors. In other embodiments, two or more antennasmay be coupled to the communications circuitryarranged for sending and receiving signals. The memorymay store information for configuring the processing circuitryto perform operations for configuring and transmitting message frames and performing the various operations described herein. The memorymay include any type of memory, including non-transitory memory, for storing information in a form readable by a machine (e.g., a computer). For example, the memorymay include a computer-readable storage device, read-only memory (ROM), random-access memory (RAM), magnetic disk storage media, optical storage media, flash-memory devices and other storage devices and media.

400 In some embodiments, the communication stationmay be part of a portable wireless communication device, such as a personal digital assistant (PDA), a laptop or portable computer with wireless communication capability, a web tablet, a wireless telephone, a smartphone, a wireless headset, a pager, an instant messaging device, a digital camera, an access point, a television, a medical device (e.g., a heart rate monitor, a blood pressure monitor, etc.), a wearable computer device, or another device that may receive and/or transmit information wirelessly.

400 401 401 In some embodiments, the communication stationmay include one or more antennas. The antennasmay include one or more directional or omnidirectional antennas, including, for example, dipole antennas, monopole antennas, patch antennas, loop antennas, microstrip antennas, or other types of antennas suitable for transmission of RF signals. In some embodiments, instead of two or more antennas, a single antenna with multiple apertures may be used. In these embodiments, each aperture may be considered a separate antenna. In some multiple-input multiple-output (MIMO) embodiments, the antennas may be effectively separated for spatial diversity and the different channel characteristics that may result between each of the antennas and the antennas of a transmitting station.

400 In some embodiments, the communication stationmay include one or more of a keyboard, a display, a non-volatile memory port, multiple antennas, a graphics processor, an application processor, speakers, and other mobile device elements. The display may be an LCD screen including a touch screen.

400 400 Although the communication stationis illustrated as having several separate functional elements, two or more of the functional elements may be combined and may be implemented by combinations of software-configured elements, such as processing elements including digital signal processors (DSPs), and/or other hardware elements. For example, some elements may include one or more microprocessors, DSPs, field-programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), radio-frequency integrated circuits (RFICs) and combinations of various hardware and logic circuitry for performing at least the functions described herein. In some embodiments, the functional elements of the communication stationmay refer to one or more processes operating on one or more processing elements.

400 Certain embodiments may be implemented in one or a combination of hardware, firmware, and software. Other embodiments may also be implemented as instructions stored on a computer-readable storage device, which may be read and executed by at least one processor to perform the operations described herein. A computer-readable storage device may include any non-transitory memory mechanism for storing information in a form readable by a machine (e.g., a computer). For example, a computer-readable storage device may include read-only memory (ROM), random-access memory (RAM), magnetic disk storage media, optical storage media, flash-memory devices, and other storage devices and media. In some embodiments, the communication stationmay include one or more processors and may be configured with instructions stored on a computer-readable storage device.

5 FIG. 500 500 500 500 500 illustrates a block diagram of an example of a machineor system upon which any one or more of the techniques (e.g., methodologies) discussed herein may be performed. In other embodiments, the machinemay operate as a standalone device or may be connected (e.g., networked) to other machines. In a networked deployment, the machinemay operate in the capacity of a server machine, a client machine, or both in server-client network environments. In an example, the machinemay act as a peer machine in peer-to-peer (P2P) (or other distributed) network environments. The machinemay be a personal computer (PC), a tablet PC, a set-top box (STB), a personal digital assistant (PDA), a mobile telephone, a wearable computer device, a web appliance, a network router, a switch or bridge, or any machine capable of executing instructions (sequential or otherwise) that specify actions to be taken by that machine, such as a base station. Further, while only a single machine is illustrated, the term “machine” shall also be taken to include any collection of machines that individually or jointly execute a set (or multiple sets) of instructions to perform any one or more of the methodologies discussed herein, such as cloud computing, software as a service (Saas), or other computer cluster configurations.

Examples, as described herein, may include or may operate on logic or a number of components, modules, or mechanisms. Modules are tangible entities (e.g., hardware) capable of performing specified operations when operating. A module includes hardware. In an example, the hardware may be specifically configured to carry out a specific operation (e.g., hardwired). In another example, the hardware may include configurable execution units (e.g., transistors, circuits, etc.) and a computer readable medium containing instructions where the instructions configure the execution units to carry out a specific operation when in operation. The configuring may occur under the direction of the executions units or a loading mechanism. Accordingly, the execution units are communicatively coupled to the computer-readable medium when the device is operating. In this example, the execution units may be a member of more than one module. For example, under operation, the execution units may be configured by a first set of instructions to implement a first module at one point in time and reconfigured by a second set of instructions to implement a second module at a second point in time.

500 502 504 506 508 500 532 510 512 514 510 512 514 500 516 518 519 520 530 528 500 534 502 504 516 519 The machine (e.g., computer system)may include a hardware processor(e.g., a central processing unit (CPU), a graphics processing unit (GPU), a hardware processor core, or any combination thereof), a main memoryand a static memory, some or all of which may communicate with each other via an interlink (e.g., bus). The machinemay further include a power management device, a graphics display device, an alphanumeric input device(e.g., a keyboard), and a user interface (UI) navigation device(e.g., a mouse). In an example, the graphics display device, alphanumeric input device, and UI navigation devicemay be a touch screen display. The machinemay additionally include a storage device (i.e., drive unit), a signal generation device(e.g., a speaker), an enhanced P2P device, a network interface device/transceivercoupled to antenna(s), and one or more sensors, such as a global positioning system (GPS) sensor, a compass, an accelerometer, or other sensor. The machinemay include an output controller, such as a serial (e.g., universal serial bus (USB), parallel, or other wired or wireless (e.g., infrared (IR), near field communication (NFC), etc.) connection to communicate with or control one or more peripheral devices (e.g., a printer, a card reader, etc.)). The operations in accordance with one or more example embodiments of the present disclosure may be carried out by a baseband processor. The baseband processor may be configured to generate corresponding baseband signals. The baseband processor may further include physical layer (PHY) and medium access control layer (MAC) circuitry, and may further interface with the hardware processorfor generation and processing of the baseband signals and for controlling operations of the main memory, the storage device, and/or the enhanced P2P device. The baseband processor may be provided on a single radio card, a single chip, or an integrated circuit (IC).

516 522 524 524 504 506 502 500 502 504 506 516 The storage devicemay include a machine readable mediumon which is stored one or more sets of data structures or instructions(e.g., software) embodying or utilized by any one or more of the techniques or functions described herein. The instructionsmay also reside, completely or at least partially, within the main memory, within the static memory, or within the hardware processorduring execution thereof by the machine. In an example, one or any combination of the hardware processor, the main memory, the static memory, or the storage devicemay constitute machine-readable media.

519 200 300 The enhanced P2P devicemay carry out or perform any of the operations and processes (e.g., process, process) described and shown above.

519 519 It is understood that the above are only a subset of what the enhanced P2P devicemay be configured to perform and that other functions included throughout this disclosure may also be performed by the enhanced P2P device.

522 524 While the machine-readable mediumis illustrated as a single medium, the term “machine-readable medium” may include a single medium or multiple media (e.g., a centralized or distributed database, and/or associated caches and servers) configured to store the one or more instructions.

Various embodiments may be implemented fully or partially in software and/or firmware. This software and/or firmware may take the form of instructions contained in or on a non-transitory computer-readable storage medium. Those instructions may then be read and executed by one or more processors to enable performance of the operations described herein. The instructions may be in any suitable form, such as but not limited to source code, compiled code, interpreted code, executable code, static code, dynamic code, and the like. Such a computer-readable medium may include any tangible non-transitory medium for storing information in a form readable by one or more computers, such as but not limited to read only memory (ROM); random access memory (RAM); magnetic disk storage media; optical storage media; a flash memory, etc.

500 500 The term “machine-readable medium” may include any medium that is capable of storing, encoding, or carrying instructions for execution by the machineand that cause the machineto perform any one or more of the techniques of the present disclosure, or that is capable of storing, encoding, or carrying data structures used by or associated with such instructions. Non-limiting machine-readable medium examples may include solid-state memories and optical and magnetic media. In an example, a massed machine-readable medium includes a machine-readable medium with a plurality of particles having resting mass. Specific examples of massed machine-readable media may include non-volatile memory, such as semiconductor memory devices (e.g., electrically programmable read-only memory (EPROM), or electrically erasable programmable read-only memory (EEPROM)) and flash memory devices; magnetic disks, such as internal hard disks and removable disks; magneto-optical disks; and CD-ROM and DVD-ROM disks.

524 526 520 520 526 520 500 The instructionsmay further be transmitted or received over a communications networkusing a transmission medium via the network interface device/transceiverutilizing any one of a number of transfer protocols (e.g., frame relay, internet protocol (IP), transmission control protocol (TCP), user datagram protocol (UDP), hypertext transfer protocol (HTTP), etc.). Example communications networks may include a local area network (LAN), a wide area network (WAN), a packet data network (e.g., the Internet), mobile telephone networks (e.g., cellular networks), plain old telephone (POTS) networks, wireless data networks (e.g., Institute of Electrical and Electronics Engineers (IEEE) 802.11 family of standards known as Wi-Fi®, IEEE 802.16 family of standards known as WiMax®), IEEE 802.15.4 family of standards, and peer-to-peer (P2P) networks, among others. In an example, the network interface device/transceivermay include one or more physical jacks (e.g., Ethernet, coaxial, or phone jacks) or one or more antennas to connect to the communications network. In an example, the network interface device/transceivermay include a plurality of antennas to wirelessly communicate using at least one of single-input multiple-output (SIMO), multiple-input multiple-output (MIMO), or multiple-input single-output (MISO) techniques. The term “transmission medium” shall be taken to include any intangible medium that is capable of storing, encoding, or carrying instructions for execution by the machineand includes digital or analog communications signals or other intangible media to facilitate communication of such software.

The operations and processes described and shown above may be carried out or performed in any suitable order as desired in various implementations. Additionally, in certain implementations, at least a portion of the operations may be carried out in parallel. Furthermore, in certain implementations, less than or more than the operations described may be performed.

6 FIG. 1 FIG. 105 105 102 120 105 105 804 806 608 105 105 a b a b a b is a block diagram of a radio architectureA,B in accordance with some embodiments that may be implemented in any one of the example APand/or the example STAof. Radio architectureA,B may include radio front-end module (FEM) circuitry-, radio IC circuitry-and baseband processing circuitry-. Radio architectureA,B as shown includes both Wireless Local Area Network (WLAN) functionality and Bluetooth (BT) functionality although embodiments are not so limited. In this disclosure, “WLAN” and “Wi-Fi” are used interchangeably.

604 604 604 604 601 606 604 601 606 604 606 601 604 606 604 604 a b a b a a b b a a b b a b 6 FIG. FEM circuitry-may include a WLAN or Wi-Fi FEM circuitryand a Bluetooth (BT) FEM circuitry. The WLAN FEM circuitrymay include a receive signal path comprising circuitry configured to operate on WLAN RF signals received from one or more antennas, to amplify the received signals and to provide the amplified versions of the received signals to the WLAN radio IC circuitryfor further processing. The BT FEM circuitrymay include a receive signal path which may include circuitry configured to operate on BT RF signals received from one or more antennas, to amplify the received signals and to provide the amplified versions of the received signals to the BT radio IC circuitryfor further processing. FEM circuitrymay also include a transmit signal path which may include circuitry configured to amplify WLAN signals provided by the radio IC circuitryfor wireless transmission by one or more of the antennas. In addition, FEM circuitrymay also include a transmit signal path which may include circuitry configured to amplify BT signals provided by the radio IC circuitryfor wireless transmission by the one or more antennas. In the embodiment of, although FEMand FEMare shown as being distinct from one another, embodiments are not so limited, and include within their scope the use of an FEM (not shown) that includes a transmit path and/or a receive path for both WLAN and BT signals, or the use of one or more FEM circuitries where at least some of the FEM circuitries share transmit and/or receive signal paths for both WLAN and BT signals.

606 606 606 606 604 608 606 604 608 606 608 604 601 606 608 604 601 6 606 606 a b a b a a a b b b a a a b b b a b Radio IC circuitry-as shown may include WLAN radio IC circuitryand BT radio IC circuitry. The WLAN radio IC circuitrymay include a receive signal path which may include circuitry to down-convert WLAN RF signals received from the FEM circuitryand provide baseband signals to WLAN baseband processing circuitry. BT radio IC circuitrymay in turn include a receive signal path which may include circuitry to down-convert BT RF signals received from the FEM circuitryand provide baseband signals to BT baseband processing circuitry. WLAN radio IC circuitrymay also include a transmit signal path which may include circuitry to up-convert WLAN baseband signals provided by the WLAN baseband processing circuitryand provide WLAN RF output signals to the FEM circuitryfor subsequent wireless transmission by the one or more antennas. BT radio IC circuitrymay also include a transmit signal path which may include circuitry to up-convert BT baseband signals provided by the BT baseband processing circuitryand provide BT RF output signals to the FEM circuitryfor subsequent wireless transmission by the one or more antennas. In the embodiment of FIG., although radio IC circuitriesandare shown as being distinct from one another, embodiments are not so limited, and include within their scope the use of a radio IC circuitry (not shown) that includes a transmit signal path and/or a receive signal path for both WLAN and BT signals, or the use of one or more radio IC circuitries where at least some of the radio IC circuitries share transmit and/or receive signal paths for both WLAN and BT signals.

608 608 608 608 608 608 608 606 606 608 608 606 a b a b a a a b a b a b a b a b. Baseband processing circuity-may include a WLAN baseband processing circuitryand a BT baseband processing circuitry. The WLAN baseband processing circuitrymay include a memory, such as, for example, a set of RAM arrays in a Fast Fourier Transform or Inverse Fast Fourier Transform block (not shown) of the WLAN baseband processing circuitry. Each of the WLAN baseband circuitryand the BT baseband circuitrymay further include one or more processors and control logic to process the signals received from the corresponding WLAN or BT receive signal path of the radio IC circuitry-, and to also generate corresponding WLAN or BT baseband signals for the transmit signal path of the radio IC circuitry-. Each of the baseband processing circuitriesandmay further include physical layer (PHY) and medium access control layer (MAC) circuitry, and may further interface with a device for generation and processing of the baseband signals and for controlling operations of the radio IC circuitry-

6 FIG. 613 608 608 603 604 604 601 604 604 604 604 a b a b a b a b. Referring still to, according to the shown embodiment, WLAN-BT coexistence circuitrymay include logic providing an interface between the WLAN baseband circuitryand the BT baseband circuitryto enable use cases requiring WLAN and BT coexistence. In addition, a switchmay be provided between the WLAN FEM circuitryand the BT FEM circuitryto allow switching between the WLAN and BT radios according to application needs. In addition, although the antennasare depicted as being respectively connected to the WLAN FEM circuitryand the BT FEM circuitry, embodiments include within their scope the sharing of one or more antennas as between the WLAN and BT FEMs, or the provision of more than one antenna connected to each of FEMor

604 606 608 602 601 604 606 606 608 812 a b a b a b a b a b a b a b In some embodiments, the front-end module circuitry-, the radio IC circuitry-, and baseband processing circuitry-may be provided on a single radio card, such as wireless radio card. In some other embodiments, the one or more antennas, the FEM circuitry-and the radio IC circuitry-may be provided on a single radio card. In some other embodiments, the radio IC circuitry-and the baseband processing circuitry-may be provided on a single chip or integrated circuit (IC), such as IC.

602 105 105 In some embodiments, the wireless radio cardmay include a WLAN radio card and may be configured for Wi-Fi communications, although the scope of the embodiments is not limited in this respect. In some of these embodiments, the radio architectureA,B may be configured to receive and transmit orthogonal frequency division multiplexed (OFDM) or orthogonal frequency division multiple access (OFDMA) communication signals over a multicarrier communication channel. The OFDM or OFDMA signals may comprise a plurality of orthogonal subcarriers.

105 105 105 105 105 105 105 105 105 105 In some of these multicarrier embodiments, radio architectureA,B may be part of a Wi-Fi communication station (STA) such as a wireless access point (AP), a base station or a mobile device including a Wi-Fi device. In some of these embodiments, radio architectureA,B may be configured to transmit and receive signals in accordance with specific communication standards and/or protocols, such as any of the Institute of Electrical and Electronics Engineers (IEEE) standards including, 802.11n-2009, IEEE 802.11-2012, IEEE 802.11-2016, 802.11n-2009, 802.11ac, 802.11ah, 802.11ad, 802.11ay, 802.11be, 802.11-2020, and/or 802.11ax standards and/or proposed specifications for WLANs, although the scope of embodiments is not limited in this respect. Radio architectureA,B may also be suitable to transmit and/or receive communications in accordance with other techniques and standards. In some embodiments, the radio architectureA,B may be configured for high-efficiency Wi-Fi (HEW) communications in accordance with the IEEE 802.11ax standard. In these embodiments, the radio architectureA,B may be configured to communicate in accordance with an OFDMA technique, although the scope of the embodiments is not limited in this respect.

105 105 In some other embodiments, the radio architectureA,B may be configured to transmit and receive signals transmitted using one or more other modulation techniques such as spread spectrum modulation (e.g., direct sequence code division multiple access (DS-CDMA) and/or frequency hopping code division multiple access (FH-CDMA)), time-division multiplexing (TDM) modulation, and/or frequency-division multiplexing (FDM) modulation, although the scope of the embodiments is not limited in this respect.

6 FIG. 608 b In some embodiments, as further shown in, the BT baseband circuitrymay be compliant with a Bluetooth (BT) connectivity standard such as Bluetooth, Bluetooth 8.0 or Bluetooth 6.0, or any other iteration of the Bluetooth Standard.

105 105 In some embodiments, the radio architectureA,B may include other radio cards, such as a cellular radio card configured for cellular (e.g., 5GPP such as LTE, LTE-Advanced or 7G communications).

105 105 In some IEEE 802.11 embodiments, the radio architectureA,B may be configured for communication over various channel bandwidths including bandwidths having center frequencies of about 900 MHz, 2.4 GHz, 5 GHz, and bandwidths of about 2 MHz, 4 MHz, 5 MHz, 5.5 MHZ, 6 MHZ, 8 MHz, 10 MHz, 20 MHZ, 40 MHz, 80 MHz (with contiguous bandwidths) or 80+80 MHz (160 MHz) (with non-contiguous bandwidths). In some embodiments, a 920 MHz channel bandwidth may be used. The scope of the embodiments is not limited with respect to the above center frequencies however.

7 FIG. 7 FIG. 7 FIG. 6 FIG. 604 604 604 a a b illustrates WLAN FEM circuitryin accordance with some embodiments. Although the example ofis described in conjunction with the WLAN FEM circuitry, the example ofmay be described in conjunction with the example BT FEM circuitry(), although other circuitry configurations may also be suitable.

604 702 604 604 706 703 707 606 604 709 606 712 715 601 714 a a a a b a a b 6 FIG. 8 FIG. In some embodiments, the FEM circuitrymay include a TX/RX switchto switch between transmit mode and receive mode operation. The FEM circuitrymay include a receive signal path and a transmit signal path. The receive signal path of the FEM circuitrymay include a low-noise amplifier (LNA)to amplify received RF signalsand provide the amplified received RF signalsas an output (e.g., to the radio IC circuitry-()). The transmit signal path of the circuitrymay include a power amplifier (PA) to amplify input RF signals(e.g., provided by the radio IC circuitry-), and one or more filters, such as band-pass filters (BPFs), low-pass filters (LPFs) or other types of filters, to generate RF signalsfor subsequent transmission (e.g., by one or more of the antennas()) via an example duplexer.

604 604 704 706 604 710 712 704 601 804 a a a a 6 FIG. In some dual-mode embodiments for Wi-Fi communication, the FEM circuitrymay be configured to operate in either the 2.4 GHz frequency spectrum or the 5 GHz frequency spectrum. In these embodiments, the receive signal path of the FEM circuitrymay include a receive signal path duplexerto separate the signals from each spectrum as well as provide a separate LNAfor each spectrum as shown. In these embodiments, the transmit signal path of the FEM circuitrymay also include a power amplifierand a filter, such as a BPF, an LPF or another type of filter for each frequency spectrum and a transmit signal path duplexerto provide the signals of one of the different spectrums onto a single transmit path for subsequent transmission by the one or more of the antennas(). In some embodiments, BT communications may utilize the 2.4 GHz signal paths and may utilize the same FEM circuitryas the one used for WLAN communications.

8 FIG. 6 FIG. 8 FIG. 606 606 606 606 606 a a a/ b b. illustrates radio IC circuitryin accordance with some embodiments. The radio IC circuitryis one example of circuitry that may be suitable for use as the WLAN or BT radio IC circuitry(), although other circuitry configurations may also be suitable. Alternatively, the example ofmay be described in conjunction with the example BT radio IC circuitry

606 606 802 806 808 606 812 814 606 804 805 802 814 802 814 814 808 812 a a a a 8 FIG. In some embodiments, the radio IC circuitrymay include a receive signal path and a transmit signal path. The receive signal path of the radio IC circuitrymay include at least mixer circuitry, such as, for example, down-conversion mixer circuitry, amplifier circuitryand filter circuitry. The transmit signal path of the radio IC circuitrymay include at least filter circuitryand mixer circuitry, such as, for example, up-conversion mixer circuitry. Radio IC circuitrymay also include synthesizer circuitryfor synthesizing a frequencyfor use by the mixer circuitryand the mixer circuitry. The mixer circuitryand/ormay each, according to some embodiments, be configured to provide direct conversion functionality. The latter type of circuitry presents a much simpler architecture as compared with standard super-heterodyne mixer circuitries, and any flicker noise brought about by the same may be alleviated for example through the use of OFDM modulation.illustrates only a simplified version of a radio IC circuitry, and may include, although not shown, embodiments where each of the depicted circuitries may include more than one component. For instance, mixer circuitrymay each include one or more mixers, and filter circuitriesand/ormay each include one or more filters, such as one or more BPFs and/or LPFs according to application needs. For example, when mixer circuitries are of the direct-conversion type, they may each include two or more mixers.

802 707 604 805 804 806 808 807 807 608 807 802 a b a b 6 FIG. 6 FIG. In some embodiments, mixer circuitrymay be configured to down-convert RF signalsreceived from the FEM circuitry-() based on the synthesized frequencyprovided by synthesizer circuitry. The amplifier circuitrymay be configured to amplify the down-converted signals and the filter circuitrymay include an LPF configured to remove unwanted signals from the down-converted signals to generate output baseband signals. Output baseband signalsmay be provided to the baseband processing circuitry-() for further processing. In some embodiments, the output baseband signalsmay be zero-frequency baseband signals, although this is not a requirement. In some embodiments, mixer circuitrymay comprise passive mixers, although the scope of the embodiments is not limited in this respect.

814 811 805 804 709 604 811 608 812 812 a b a b In some embodiments, the mixer circuitrymay be configured to up-convert input baseband signalsbased on the synthesized frequencyprovided by the synthesizer circuitryto generate RF output signalsfor the FEM circuitry-. The baseband signalsmay be provided by the baseband processing circuitry-and may be filtered by filter circuitry. The filter circuitrymay include an LPF or a BPF, although the scope of the embodiments is not limited in this respect.

802 814 804 802 814 802 814 802 814 In some embodiments, the mixer circuitryand the mixer circuitrymay each include two or more mixers and may be arranged for quadrature down-conversion and/or up-conversion respectively with the help of synthesizer. In some embodiments, the mixer circuitryand the mixer circuitrymay each include two or more mixers each configured for image rejection (e.g., Hartley image rejection). In some embodiments, the mixer circuitryand the mixer circuitrymay be arranged for direct down-conversion and/or direct up-conversion, respectively. In some embodiments, the mixer circuitryand the mixer circuitrymay be configured for super-heterodyne operation, although this is not a requirement.

802 707 805 804 7 FIG. 8 FIG. Mixer circuitrymay comprise, according to one embodiment: quadrature passive mixers (e.g., for the in-phase (I) and quadrature phase (Q) paths). In such an embodiment, RF input signalfrommay be down-converted to provide I and Q baseband output signals to be sent to the baseband processor Quadrature passive mixers may be driven by zero and ninety-degree time-varying LO switching signals provided by a quadrature circuitry which may be configured to receive a LO frequency (fLO) from a local oscillator or a synthesizer, such as LO frequencyof synthesizer(). In some embodiments, the LO frequency may be the carrier frequency, while in other embodiments, the LO frequency may be a fraction of the carrier frequency (e.g., one-half the carrier frequency, one-third the carrier frequency). In some embodiments, the zero and ninety-degree time-varying switching signals may be generated by the synthesizer, although the scope of the embodiments is not limited in this respect.

In some embodiments, the LO signals may differ in duty cycle (the percentage of one period in which the LO signal is high) and/or offset (the difference between start points of the period). In some embodiments, the LO signals may have an 85% duty cycle and an 80% offset. In some embodiments, each branch of the mixer circuitry (e.g., the in-phase (I) and quadrature phase (Q) path) may operate at an 80% duty cycle, which may result in a significant reduction is power consumption.

707 806 808 7 FIG. 8 FIG. 8 FIG. The RF input signal() may comprise a balanced signal, although the scope of the embodiments is not limited in this respect. The I and Q baseband output signals may be provided to low-noise amplifier, such as amplifier circuitry() or to filter circuitry().

807 811 807 811 In some embodiments, the output baseband signalsand the input baseband signalsmay be analog baseband signals, although the scope of the embodiments is not limited in this respect. In some alternate embodiments, the output baseband signalsand the input baseband signalsmay be digital baseband signals. In these alternate embodiments, the radio IC circuitry may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuitry.

In some dual-mode embodiments, a separate radio IC circuitry may be provided for processing signals for each spectrum, or for other spectrums not mentioned here, although the scope of the embodiments is not limited in this respect.

804 804 804 804 608 805 610 610 101 103 a b 6 FIG. In some embodiments, the synthesizer circuitrymay be a fractional-N synthesizer or a fractional N/N+1 synthesizer, although the scope of the embodiments is not limited in this respect as other types of frequency synthesizers may be suitable. For example, synthesizer circuitrymay be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider. According to some embodiments, the synthesizer circuitrymay include digital synthesizer circuitry. An advantage of using a digital synthesizer circuitry is that, although it may still include some analog components, its footprint may be scaled down much more than the footprint of an analog synthesizer circuitry. In some embodiments, frequency input into synthesizer circuitymay be provided by a voltage controlled oscillator (VCO), although that is not a requirement. A divider control input may further be provided by either the baseband processing circuitry-() depending on the desired output frequency. In some embodiments, a divider control input (e.g., N) may be determined from a look-up table (e.g., within a Wi-Fi card) based on a channel number and a channel center frequency as determined or indicated by the example application processor. The application processormay include, or otherwise be connected to, one of the example secure signal converteror the example received signal converter(e.g., depending on which device the example radio architecture is implemented in).

804 805 805 805 In some embodiments, synthesizer circuitrymay be configured to generate a carrier frequency as the output frequency, while in other embodiments, the output frequencymay be a fraction of the carrier frequency (e.g., one-half the carrier frequency, one-third the carrier frequency). In some embodiments, the output frequencymay be a LO frequency (fLO).

9 FIG. 6 FIG. 8 FIG. 6 FIG. 608 608 608 608 a a a b illustrates a functional block diagram of baseband processing circuitryin accordance with some embodiments. The baseband processing circuitryis one example of circuitry that may be suitable for use as the baseband processing circuitry(), although other circuitry configurations may also be suitable. Alternatively, the example ofmay be used to implement the example BT baseband processing circuitryof.

608 902 809 606 904 811 606 608 906 608 a a b a b a a. 6 FIG. The baseband processing circuitrymay include a receive baseband processor (RX BBP)for processing receive baseband signalsprovided by the radio IC circuitry-() and a transmit baseband processor (TX BBP)for generating transmit baseband signalsfor the radio IC circuitry-. The baseband processing circuitrymay also include control logicfor coordinating the operations of the baseband processing circuitry

608 606 608 910 909 606 902 608 912 904 911 a b a b a a b a In some embodiments (e.g., when analog baseband signals are exchanged between the baseband processing circuitry-and the radio IC circuitry-), the baseband processing circuitrymay include ADCto convert analog baseband signalsreceived from the radio IC circuitry-to digital baseband signals for processing by the RX BBP. In these embodiments, the baseband processing circuitrymay also include DACto convert digital baseband signals from the TX BBPto analog baseband signals.

608 904 902 902 a In some embodiments that communicate OFDM signals or OFDMA signals, such as through baseband processor, the transmit baseband processormay be configured to generate OFDM or OFDMA signals as appropriate for transmission by performing an inverse fast Fourier transform (IFFT). The receive baseband processormay be configured to process received OFDM signals or OFDMA signals by performing an FFT. In some embodiments, the receive baseband processormay be configured to detect the presence of an OFDM signal or OFDMA signal by performing an autocorrelation, to detect a preamble, such as a short preamble, and by performing a cross-correlation, to detect a long preamble. The preambles may be part of a predetermined frame structure for Wi-Fi communication.

6 FIG. 6 FIG. 601 601 Referring back to, in some embodiments, the antennas() may each comprise one or more directional or omnidirectional antennas, including, for example, dipole antennas, monopole antennas, patch antennas, loop antennas, microstrip antennas or other types of antennas suitable for transmission of RF signals. In some multiple-input multiple-output (MIMO) embodiments, the antennas may be effectively separated to take advantage of spatial diversity and the different channel characteristics that may result. Antennasmay each include a set of phased-array antennas, although embodiments are not so limited.

105 105 Although the radio architectureA,B is illustrated as having several separate functional elements, one or more of the functional elements may be combined and may be implemented by combinations of software-configured elements, such as processing elements including digital signal processors (DSPs), and/or other hardware elements. For example, some elements may comprise one or more microprocessors, DSPs, field-programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), radio-frequency integrated circuits (RFICs) and combinations of various hardware and logic circuitry for performing at least the functions described herein. In some embodiments, the functional elements may refer to one or more processes operating on one or more processing elements.

The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments. The terms “computing device,” “user device,” “communication station,” “station,” “handheld device,” “mobile device,” “wireless device” and “user equipment” (UE) as used herein refers to a wireless communication device such as a cellular telephone, a smartphone, a tablet, a netbook, a wireless terminal, a laptop computer, a femtocell, a high data rate (HDR) subscriber station, an access point, a printer, a point of sale device, an access terminal, or other personal communication system (PCS) device. The device may be either mobile or stationary.

As used within this document, the term “communicate” is intended to include transmitting, or receiving, or both transmitting and receiving. This may be particularly useful in claims when describing the organization of data that is being transmitted by one device and received by another, but only the functionality of one of those devices is required to infringe the claim. Similarly, the bidirectional exchange of data between two devices (both devices transmit and receive during the exchange) may be described as “communicating,” when only the functionality of one of those devices is being claimed. The term “communicating” as used herein with respect to a wireless communication signal includes transmitting the wireless communication signal and/or receiving the wireless communication signal. For example, a wireless communication unit, which is capable of communicating a wireless communication signal, may include a wireless transmitter to transmit the wireless communication signal to at least one other wireless communication unit, and/or a wireless communication receiver to receive the wireless communication signal from at least one other wireless communication unit. As used herein, unless otherwise specified, the use of the ordinal adjectives “first,” “second,” “third,” etc., to describe a common object, merely indicates that different instances of like objects are being referred to and are not intended to imply that the objects so described must be in a given sequence, either temporally, spatially, in ranking, or in any other manner. The term “access point” (AP) as used herein may be a fixed station. An access point may also be referred to as an access node, a base station, an evolved node B (eNodeB), or some other similar terminology known in the art. An access terminal may also be called a mobile station, user equipment (UE), a wireless communication device, or some other similar terminology known in the art. Embodiments disclosed herein generally pertain to wireless networks. Some embodiments may relate to wireless networks that operate in accordance with one of the IEEE 802.11 standards.

Some embodiments may be used in conjunction with various devices and systems, for example, a personal computer (PC), a desktop computer, a mobile computer, a laptop computer, a notebook computer, a tablet computer, a server computer, a handheld computer, a handheld device, a personal digital assistant (PDA) device, a handheld PDA device, an on-board device, an off-board device, a hybrid device, a vehicular device, a non-vehicular device, a mobile or portable device, a consumer device, a non-mobile or non-portable device, a wireless communication station, a wireless communication device, a wireless access point (AP), a wired or wireless router, a wired or wireless modem, a video device, an audio device, an audio-video (A/V) device, a wired or wireless network, a wireless area network, a wireless video area network (WVAN), a local area network (LAN), a wireless LAN (WLAN), a personal area network (PAN), a wireless PAN (WPAN), and the like.

Some embodiments may be used in conjunction with one way and/or two-way radio communication systems, cellular radio-telephone communication systems, a mobile phone, a cellular telephone, a wireless telephone, a personal communication system (PCS) device, a PDA device which incorporates a wireless communication device, a mobile or portable global positioning system (GPS) device, a device which incorporates a GPS receiver or transceiver or chip, a device which incorporates an RFID element or chip, a multiple input multiple output (MIMO) transceiver or device, a single input multiple output (SIMO) transceiver or device, a multiple input single output (MISO) transceiver or device, a device having one or more internal antennas and/or external antennas, digital video broadcast (DVB) devices or systems, multi-standard radio devices or systems, a wired or wireless handheld device, e.g., a smartphone, a wireless application protocol (WAP) device, or the like.

Some embodiments may be used in conjunction with one or more types of wireless communication signals and/or systems following one or more wireless communication protocols, for example, radio frequency (RF), infrared (IR), frequency-division multiplexing (FDM), orthogonal FDM (OFDM), time-division multiplexing (TDM), time-division multiple access (TDMA), extended TDMA (E-TDMA), general packet radio service (GPRS), extended GPRS, code-division multiple access (CDMA), wideband CDMA (WCDMA), CDMA 2000, single-carrier CDMA, multi-carrier CDMA, multi-carrier modulation (MDM), discrete multi-tone (DMT), Bluetooth®, global positioning system (GPS), Wi-Fi, Wi-Max, ZigBee, ultra-wideband (UWB), global system for mobile communications (GSM), 2G, 2.5G, 3G, 3.5G, 4G, fifth generation (5G) mobile networks, 3GPP, long term evolution (LTE), LTE advanced, enhanced data rates for GSM Evolution (EDGE), or the like. Other embodiments may be used in various other devices, systems, and/or networks.

Example 1 may be an apparatus of a device for facilitating Wi-Fi peer-to-peer (P2P) communications in a scheduled basic service set, the apparatus comprising processing circuitry coupled to storage, the processing circuitry configured to: identify a service period for station devices in a basic service set, the service period comprising a polling portion, a resource allocation portion, and a data transmission portion comprising transmit opportunities (TXOPs); cause the device to transmit, during the polling portion, a traffic indication map (TIM) to the station devices; cause the device to transmit, during the polling portion, a null data packet (NDP) feedback report (NFRP) trigger frame associated with requesting the station devices to request transmissions based on the TIM; identify, during the polling portion, NDP responses received from the station devices based on the NFRP trigger frame, the NDP responses indicative of requested transmissions; cause the device to transmit, during the resource allocation portion, an opportunistic power save (OPS) frame to the station devices, the OPS frame indicating that the station devices are to be awake during the data transmission portion; and cause the device to transmit an indication associated with at least one of the station devices applying multi-user (MU) enhanced distributed channel access (EDCA) following a trigger-based channel access opportunity during the service period or with using a TXOP of the TXOPs for Wi-Fi P2P communications. Example 2 may include the apparatus of example 1 and/or some other example herein, wherein the indication is associated with the at least one of the station devices applying MU. EDCA following a trigger-based channel access opportunity during the service period. Example 3 may include the apparatus of example 2 and/or some other example herein, wherein the indication indicates that a station device of the station devices is permitted to use EDCA based on a backoff timer set to begin at the end of the service period. Example 4 may include the apparatus of example 2 and/or some other example herein, wherein the indication indicates that MU EDCA timer rules are suspended during the service period. Example 5 may include the apparatus of example 4 and/or some other example herein, wherein the indication indicates that the MU EDCA timer rule are suspended for a first station device of the station devices, and are not suspended for a second station device of the station devices. Example 6 may include the apparatus of example 2 and/or some other example herein, wherein a trigger frame comprises the indication. Example 7 may include the apparatus of example 2 and/or some other example herein, wherein a management frame comprises the indication. Example 8 may include the apparatus of example 2 and/or some other example herein, wherein a control frame comprises the indication. Example 9 may include the apparatus of example 2 and/or some other example herein, wherein the indication comprises arbitration interframe space number parameters and codeword parameters associated with the MU EDCA. Example 10 may include the apparatus of example 1 and/or some other example herein, wherein the indication is associated with using the TXOP of the TXOPs for the Wi-Fi P2P communications. Example 11 may include the apparatus of example 10 and/or some other example herein, wherein a null data packet (NDP) feedback report (NFRP) trigger frame, transmitted during the polling portion, comprises the indication. Example 12 may include the apparatus of example 10 and/or some other example herein, wherein at least one of the NDP responses comprises an indication of a request for the Wi-Fi P2P communications. Example 13 may include the apparatus of example 10 and/or some other example herein, wherein an opportunistic power save frame comprises the indication. Example 14 may include the apparatus of example 10 and/or some other example herein, wherein a multi-user (MU) request-to-send (RTX) shared TXOP (TXS) frame comprises the indication. Example 15 may include the apparatus of example 14 and/or some other example herein, wherein the indication comprises a time and a resource unit associated with the Wi-Fi P2P communications. Example 16 may include the apparatus of example 14 and/or some other example herein, wherein the indication comprises a second indication indicative of whether a station device of the station devices is to wait for a second MU RTS TXS frame prior to initiating the Wi-Fi P2P communications. Example 17 may include the apparatus of any of examples 1-16 and/or some other example herein, further comprising a transceiver configured to transmit and receive wireless signals. Example 18 may include the apparatus of example 17 and/or some other example herein, further comprising one or more antennas coupled to the transceiver. Example 19 may include a computer-readable storage medium comprising instructions to cause processing circuitry of a device for facilitating Wi-Fi peer-to-peer (P2P) communications in a scheduled basic service set, upon execution of the instructions by the processing circuitry, to: identify a service period for station devices in a basic service set, the service period comprising a polling portion, a resource allocation portion, and a data transmission portion comprising transmit opportunities (TXOPs); cause the device to transmit, during the polling portion, a traffic indication map (TIM) to the station devices; cause the device to transmit, during the polling portion, a null data packet (NDP) feedback report (NFRP) trigger frame associated with requesting the station devices to request transmissions based on the TIM; identify, during the polling portion, NDP responses received from the station devices based on the NFRP trigger frame, the NDP responses indicative of requested transmissions; cause the device to transmit, during the resource allocation portion, an opportunistic power save (OPS) frame to the station devices, the OPS frame indicating that the station devices are to be awake during the data transmission portion; and cause the device to transmit an indication associated with at least one of the station devices applying multi-user (MU) enhanced distributed channel access (EDCA) following a trigger-based channel access opportunity during the service period or with using a TXOP of the TXOPs for Wi-Fi P2P communications. Example 20 may include the computer-readable medium of example 19 and/or some other example herein, wherein the indication is associated with the at least one of the station devices applying MU EDCA following a trigger-based channel access opportunity during the service period. Example 21 may include the computer-readable medium of example 20 and/or some other example herein, wherein a trigger frame, a management frame, or a control frame comprises the indication. Example 22 may include the computer-readable medium of example 19 and/or some other example herein, wherein the indication is associated with using the TXOP of the TXOPs for the Wi-Fi P2P communications. Example 23 may include the computer-readable medium of example 22 and/or some other example herein, wherein a null data packet (NDP) feedback report (NFRP) trigger frame, an opportunistic power save frame, or a multi-user (MU) request-to-send (RTX) shared TXOP (TXS) frame comprises the indication. Example 24 may include a method for facilitating Wi-Fi peer-to-peer (P2P) communications in a scheduled basic service set, the method comprising: identifying, by processing circuitry of an access point device, a service period for station devices in a basic service set, the service period comprising a polling portion, a resource allocation portion, and a data transmission portion comprising transmit opportunities (TXOPs); causing, by the processing circuitry, the access point device to transmit, during the polling portion, a traffic indication map (TIM) to the station devices; causing, by the processing circuitry, the access point device to transmit, during the polling portion, a null data packet (NDP) feedback report (NFRP) trigger frame associated with requesting the station devices to request transmissions based on the TIM; identifying, by the processing circuitry, during the polling portion, NDP responses received from the station devices based on the NFRP trigger frame, the NDP responses indicative of requested transmissions; causing, by the processing circuitry, the access point device to transmit, during the resource allocation portion, an opportunistic power save (OPS) frame to the station devices, the OPS frame indicating that the station devices are to be awake during the data transmission portion; and causing, by the processing circuitry, the access point device to transmit an indication associated with at least one of the station devices applying multi-user (MU) enhanced distributed channel access (EDCA) following a trigger-based channel access opportunity during the service period or with using a TXOP of the TXOPs for Wi-Fi P2P communications. Example 25 may include the method of example 24 and/or some other example herein, wherein at least one of the NDP responses comprises an indication of a request for the Wi-Fi P2P communications. Example 26 may include an apparatus comprising means for: identifying, by an access point device, a service period for station devices in a basic service set, the service period comprising a polling portion, a resource allocation portion, and a data transmission portion comprising transmit opportunities (TXOPs); causing the access point device to transmit, during the polling portion, a traffic indication map (TIM) to the station devices; causing the access point device to transmit, during the polling portion, a null data packet (NDP) feedback report (NFRP) trigger frame associated with requesting the station devices to request transmissions based on the TIM; identifying, during the polling portion, NDP responses received from the station devices based on the NFRP trigger frame, the NDP responses indicative of requested transmissions; causing the access point device to transmit, during the resource allocation portion, an opportunistic power save (OPS) frame to the station devices, the OPS frame indicating that the station devices are to be awake during the data transmission portion; and causing the access point device to transmit an indication associated with at least one of the station devices applying multi-user (MU) enhanced distributed channel access (EDCA) following a trigger-based channel access opportunity during the service period or with using a TXOP of the TXOPs for Wi-Fi P2P communications. Example 27 may include one or more non-transitory computer-readable media comprising instructions to cause an electronic device, upon execution of the instructions by one or more processors of the electronic device, to perform one or more elements of a method described in or related to any of examples 1-26, or any other method or process described herein. Example 28 may include an apparatus comprising logic, modules, and/or circuitry to perform one or more elements of a method described in or related to any of examples 1-26, or any other method or process described herein. Example 29 may include a method, technique, or process as described in or related to any of examples 1-26, or portions or parts thereof. Example 30 may include an apparatus comprising: one or more processors and one or more computer readable media comprising instructions that, when executed by the one or more processors, cause the one or more processors to perform the method, techniques, or process as described in or related to any of examples 1-26, or portions thereof. Example 31 may include a method of communicating in a wireless network as shown and described herein. Example 32 may include a system for providing wireless communication as shown and described herein. Example 33 may include a device for providing wireless communication as shown and described herein. The following examples pertain to further embodiments.

Embodiments according to the disclosure are in particular disclosed in the attached claims directed to a method, a storage medium, a device and a computer program product, wherein any feature mentioned in one claim category, e.g., method, can be claimed in another claim category, e.g., system, as well. The dependencies or references back in the attached claims are chosen for formal reasons only. However, any subject matter resulting from a deliberate reference back to any previous claims (in particular multiple dependencies) can be claimed as well, so that any combination of claims and the features thereof are disclosed and can be claimed regardless of the dependencies chosen in the attached claims. The subject-matter which can be claimed comprises not only the combinations of features as set out in the attached claims but also any other combination of features in the claims, wherein each feature mentioned in the claims can be combined with any other feature or combination of other features in the claims. Furthermore, any of the embodiments and features described or depicted herein can be claimed in a separate claim and/or in any combination with any embodiment or feature described or depicted herein or with any of the features of the attached claims.

The foregoing description of one or more implementations provides illustration and description, but is not intended to be exhaustive or to limit the scope of embodiments to the precise form disclosed. Modifications and variations are possible in light of the above teachings or may be acquired from practice of various embodiments.

Certain aspects of the disclosure are described above with reference to block and flow diagrams of systems, methods, apparatuses, and/or computer program products according to various implementations. It will be understood that one or more blocks of the block diagrams and flow diagrams, and combinations of blocks in the block diagrams and the flow diagrams, respectively, may be implemented by computer-executable program instructions. Likewise, some blocks of the block diagrams and flow diagrams may not necessarily need to be performed in the order presented, or may not necessarily need to be performed at all, according to some implementations.

These computer-executable program instructions may be loaded onto a special-purpose computer or other particular machine, a processor, or other programmable data processing apparatus to produce a particular machine, such that the instructions that execute on the computer, processor, or other programmable data processing apparatus create means for implementing one or more functions specified in the flow diagram block or blocks. These computer program instructions may also be stored in a computer-readable storage media or memory that may direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable storage media produce an article of manufacture including instruction means that implement one or more functions specified in the flow diagram block or blocks. As an example, certain implementations may provide for a computer program product, comprising a computer-readable storage medium having a computer-readable program code or program instructions implemented therein, said computer-readable program code adapted to be executed to implement one or more functions specified in the flow diagram block or blocks. The computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational elements or steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions that execute on the computer or other programmable apparatus provide elements or steps for implementing the functions specified in the flow diagram block or blocks.

Accordingly, blocks of the block diagrams and flow diagrams support combinations of means for performing the specified functions, combinations of elements or steps for performing the specified functions and program instruction means for performing the specified functions. It will also be understood that each block of the block diagrams and flow diagrams, and combinations of blocks in the block diagrams and flow diagrams, may be implemented by special-purpose, hardware-based computer systems that perform the specified functions, elements or steps, or combinations of special-purpose hardware and computer instructions.

Conditional language, such as, among others, “can,” “could,” “might,” or “may,” unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain implementations could include, while other implementations do not include, certain features, elements, and/or operations. Thus, such conditional language is not generally intended to imply that features, elements, and/or operations are in any way required for one or more implementations or that one or more implementations necessarily include logic for deciding, with or without user input or prompting, whether these features, elements, and/or operations are included or are to be performed in any particular implementation.

Many modifications and other implementations of the disclosure set forth herein will be apparent having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the disclosure is not to be limited to the specific implementations disclosed and that modifications and other implementations are intended to be included within the scope of the appended claims. Although specified terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.